Cream-separator driving means



March 12, 1929.

W. WEBB CREAM SEPARATOR DRIVING MEANS Filed Match 192a ill) PatentedFeller l2,

UNITED STATES PATENT OFFICE.

WALTER WEBB, 0F WHANGAREI, NEW ZEALAND.

CREAM-SEPARATOR DRIVING MEANS.

Application filed March 9, 1528, Serial No. 269,468, and in New ZealandJune 29, 1927.

This invention relates to in'iproved driving; nu ans he use in theoperation of cr am sepand which means are designed to provide or thelrive of the separator mechanism being taken gradually from the drivingbelt so that no shock is given the separator mechanism, They alsoprovide for any shecks in transmit" l, taken up by allowing ot thedriving belt sipping.

The invention consl is in the combination with the separations driving gcar spindle, a have and a last pulley mounted side by side thereon and.which at pure is made of special shape in order to ohta 1 the resultsl/l I Lw ,l v 4 who:emeatcoued. inure, r-:?lf rm lees mat pulley theperipheral :au' ace made 0 slope to an increa -inp manicler from thelilllil lge, adjacent to the loose pulley, to its outer edge, and alsois made with a helical, or screw thread groove cxrcndii round and,across the full surface area, there "lid groove is made of oppo ite handto the direction at rotation of the pulley and travel oi the belt.

The invention also embodies the con'ibina- 'tion with these pulleys of abelt TUitlQ or striker oi novel term designed in tion to allow for thedriving belt -2 impeded movement when pa 1 th loose lo the fast pullcvand climbing on to the ltlltur.

lnt

*st pulley anal (l the loose pulley side men the spindle A.

his iuwnion the said last pulley ll is heral surl'arc tapera t to theloose pub t the pullcys outside diameter corlv increases, and with semitamer-ed surl'aije termed with a helical groove extending); round andacross full width, shown in the drawin This groove runs revcrselv to thedirect on of the pulleys rotation The edge of this pulley ad" nt to theloose pulley is oi the same diameter as the loose sulley, so that thedriving belt D may h its outer per icy so pass from one pulley to theother when actuated by its guide.

ln the operation of this drive, as the belt is forced by its guide tomove from the loose pulley G on to the fast pulley B, it will, by reasonof the taper, gradually engage the fast pulley to overcome the inertiaof the appliance being driven and will be retarded somewhat by theaction oi the helical groove torming a reverse screw so that it willslip and catch again, until finally the full drive is taken up. Likewiseany shock in the drive transmission will be allowed for by the facilityor the belt slipping back upon the pul leys tapered and screwed surface.

lhc belt guide, or shittiugmcaus, formed by two circular rings E thatare provided to encircle the pulleys B and C and each of which rings isattached to a boss E that is formed with a temzle screw threaded bore. Ascrew rod ii is provided to screw through both bosses and such rod iscarried in suitable bearings so that it extends parallel with thespindle A and is held from longitudinal movement. ln the drawings thisrod is shown as being carried in bearer brackets (l extending from themain spindle bearings ll. Its outer end is provided with a hand wheel Jtor use in turning it.

The guide rings E are retained in position around the pulleys, and arekept from turning on the rod by any approved means that will permit alsoof their movement along the pulleys widths, as for instance by slidingon the rod K arranged to extend between the braclv cts (1:.

The rod F has the guide rings E disposed upon it at such a distanceapart to allow for the driving belt 1) being accommodated between them,but the outer portion of the rods length on which the outer ring: movesin its travel from the outer to the inner edge ot the loose pulley, ismade with a screw the pitch of which is slower than is the pileh oi theportion on which the inner ring is mounted. Conveniently the relativeratio i two to one, that is the outer p rtion is half as quick as theinner portion. The respc tivc bosses E are correspondingly threaded.

This means that with the guide rings positioned to retain the belt Dupon the loose pulley, each ring is at the outer end of its limit ofmovement, the tWo rod portions being, if necessary, divided by the smallcollar On the rod then being turned to cause the belt to be forced on tothe fast pulley,

the inner guide will travel twice the distance of the outer guide in thesame time so that it will leave an unimpeded way for the belt to climbon to the fast pulley. lin. shifting the belt back from the fast to theloose pulley, the reverse action takes place.

I claini:

1. Belt actuated driving means for use with a cream separator,comprising a driving spindle and a loose and a fast pulley mounted sideby side on said spindle said fast pulley having an outer concd surfaceincreasing in diameter from the edge adjacent the loose pulley to theedge distant therefrom, and being provided on said coned surface with ahelical groove extending around and across its width.

Apparatus as set forth in claim 1 characterized by the provision of afast coned pulley provided with a helical groove extending around andacross its entire width and being of opposite hand to the direction ofrotation of the pulley.

3. In apparatus as set forth in claim 1, lelt guide means fortransferring a belt from one pulley to the other, said guide meanscomprising two guide rings disposed around said pulleys, ascrew-threaded rod extending parallel with said driving spindle andthrough said rings, the threaded portions of said rod passing throughthe respective rings having a relatively fast and slou pitch, and meansfor rotating said rod, whereby said guide rings are adapted to travelalong said rod at relatively different speeds.

In testimony whereof. I afiix my signature.

WALTER WEBB.

